Q. No.The given figure shows the phylogenetic evolution of plants with A, B, C and D representing common ancestors in the lineage. Identify A, B, C and D:
A
B
C
D
1.
Vascular plants
Seed plants
Green plants
Land plants
2.
Land plants
Green plants
Seed plants
Vascular plants
3.
Green plants
Land plants
Vascular plants
Seed plants
4.
Seed plants
Vascular plants
Land plants
Green plants
| 1. | Gymnosperm | 2. | Angiosperm |
| 3. | Bryophyte | 4. | Pteridophyte |
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The given figure represents:
1. Equisetum, a horsetail where A is macrophyll and B is microphyll
2. Sphagnum, peat moss where A is microphyll and B is macrophyll
3. Equisetum, a horsetail where A is archegonial branch and B is antheridial branch
4. Sphagnum, peat moss where A is archegonial branch and B is antheridial branch
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1. the gametophytic generation in the life cycle of a fern
2. the sporophytic generation in the life cycle of a fern
3. the gametophytic generation in the life cycle of a moss
4. the sporophytic generation in the life cycle of a moss
The given diagram shows :
| 1. An alga that lacks flagellated cells 2. A liverwort 3. A heterosporous pteridophyte 4. A gymnosperm with non motile sperms |
 |
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Consider the following statements:
I. Pteridophytes are the first terrestrial plants to possess vascular bundles.
II. Main plant body in pteridophytes is sporophyte which is differentiated into true stem and leaves.
III. Genera like Selaginella and Salvinia are heterosporous.
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II and III |
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| Statement I: | In Cycas, the pinnate leaves persist for a few years. |
| Statement II: | In conifers, the needle-like leaves reduce the surface area helping to reduce water loss. |
2. Statement I is incorrect but Statement II is correct
3. Statement I and Statement II are correct
4. Statement I and Statement II are incorrect
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Heterospory in some pteridophytes paved the way for the evolution of seeds in higher plants. |
| Reason (R): | The megaspores and microspores in heterosporous ferns give rise to female and male gametophytes respectively. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
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Consider the given statements regarding certain pteridophytes:
Statement I: In Selaginella and Equisetum, sporophylls may form distinct compact structures called strobili or cones.
Statement II: Selaginella and Salvinia are heterosporous.
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Statement I and Statement II are correct
4. Statement I and Statement II are incorrect
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I. Protonema is a gametophyte stage that is creeping, green, branched and frequently filamentous.
II. Leafy stage bears sex organs and is attached to the soil through multicellular and branched rhizoids.
III. Sex organs are produced at the apex of the leafy shoot.
IV. They have an elaborate mechanism of spore dispersal.
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
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